mustn't/can't/won't/shan't的用法和区别,请详细一点.

问题描述:

mustn't/can't/won't/shan't的用法和区别,请详细一点.

mustn't 是绝不,禁止的意思.
can't 是不可能的意思.
won't 是不允许的意思.
shan't是不应该的意思.